Device for protecting an electronic printed circuit board

A method for protecting an electronic printed circuit board, said printed circuit comprising at least two layers, wherein the method comprises:

• a step of laying out a conductive part uniformly spread on an insulator layer, the entirety comprising the conductive part and the insulator layer forming a capacitive support presenting a uniform electrical field over the whole surface of one of the layers of the electronic printed circuit board, said capacitive support being placed on the whole surface and being configured to deliver a reference capacitance for the whole surface;
• a capacitive measurement step implemented by a capacitive measurement microprocessor electrically connected to said capacitive support, said microprocessor being configured to detect a variation in capacitance of said capacitive support for the whole surface;
• and
• a step of transmitting a piece of information representing said variation of capacitance when an absolute value of a difference between a capacitance measured by said capacitive measurement microprocessor and said reference capacitance exceeds a predetermined threshold.

A payment terminal comprising:

• an electronic printed circuit board comprising at least two layers;
• a device for protecting the electronic printed circuit board, wherein the device comprises:
• a conductive part uniformly spread on an insulator layer, the entirety comprising the conductive part and the insulator layer forming a capacitive support presenting a uniform electrical field over the whole surface of one of the layers of the electronic printed circuit board, said capacitive support being placed on the whole surface and being configured to deliver a reference capacitance for the whole surface;
• a capacitive measurement microprocessor electrically connected to said capacitive support, said microprocessor being configured to detect a variation in capacitance of said capacitive support for the whole surface;
• and
• a transmitter configured for transmitting a piece of information representing said variation of capacitance when an absolute value of a difference between a capacitance measured by said capacitive measurement microprocessor and said reference capacitance exceeds a predetermined threshold.

A computer program comprising program code instructions recorded on a non-transitory computer-readable memory to implement a method for protecting an electronic printed circuit board comprising at least two layers, when the program is executed by a processor, wherein the method comprises:

• laying out a conductive part uniformly spread on an insulator layer, the entirety comprising the conductive part and the insulator layer forming a capacitive support presenting a uniform electrical field over the whole surface of one of the layers of the electronic printed circuit board, said capacitive support being placed on the whole surface and being configured to deliver a reference capacitance for the whole surface;
• a capacitive measurement step implemented by a capacitive measurement microprocessor electrically connected to said capacitive support, said microprocessor being configured to detect a variation in capacitance of said capacitive support for the whole surface;
• and
• transmitting a piece of information representing said variation of capacitance when an absolute value of a difference between a capacitance measured by said capacitive measurement microprocessor and said reference capacitance exceeds a predetermined threshold.